<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Flate.php 18993 2009-11-15 17:09:16Z alexander $
 */


/** Zend_Pdf_Filter_Compression */
require_once 'Zend/Pdf/Filter/Compression.php';

/**
 * Flate stream filter
 *
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Pdf_Filter_Compression_Flate extends Zend_Pdf_Filter_Compression
{
	/**
	 * Encode data
	 *
	 * @param string $data
	 * @param array $params
	 * @return string
	 * @throws Zend_Pdf_Exception
	 */
	public static function encode($data, $params = null)
	{
		if ($params != null) {
			$data = self::_applyEncodeParams($data, $params);
		}

		if (extension_loaded('zlib')) {
			$trackErrors = ini_get( "track_errors");
			ini_set('track_errors', '1');

			if (($output = @gzcompress($data)) === false) {
				ini_set('track_errors', $trackErrors);
				require_once 'Zend/Pdf/Exception.php';
				throw new Zend_Pdf_Exception($php_errormsg);
			}

			ini_set('track_errors', $trackErrors);
		} else {
			require_once 'Zend/Pdf/Exception.php';
			throw new Zend_Pdf_Exception('Not implemented yet. You have to use zlib extension.');
		}

		return $output;
	}

	/**
	 * Decode data
	 *
	 * @param string $data
	 * @param array $params
	 * @return string
	 * @throws Zend_Pdf_Exception
	 */
	public static function decode($data, $params = null)
	{
		global $php_errormsg;

		if (extension_loaded('zlib')) {
			$trackErrors = ini_get( "track_errors");
			ini_set('track_errors', '1');

			if (($output = @gzuncompress($data)) === false) {
				ini_set('track_errors', $trackErrors);
				require_once 'Zend/Pdf/Exception.php';
				throw new Zend_Pdf_Exception($php_errormsg);
			}

			ini_set('track_errors', $trackErrors);
		} else {
			require_once 'Zend/Pdf/Exception.php';
			throw new Zend_Pdf_Exception('Not implemented yet');
		}

		if ($params !== null) {
			return self::_applyDecodeParams($output, $params);
		} else {
			return $output;
		}
	}
}
